Portion of a watch



FIG. 1 is a perspective view of a portion of a watch showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a side view of one side thereof, the other side being a mirror image thereof;

FIG. 4 is an end view thereof, the other end view being a mirror image thereof; and,

FIG. 5 is a bottom view thereof.

The broken line showing of the end portions of the watch band is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a portion of a watch, as shown and described. 